Test 6 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718Test 6 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718Read the following five statements (I to V) and select the option with all correct statements.
| I: | Mosses and lichens are the first organisms to colonise bare rock. |
| II: | Selaginella is a homosporous pteridophyte. |
| III: | Coralloid roots in Cycas have VAM. |
| IV: | Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic. |
| V: | In gymnosperms, male and female gametophytes are present within sporangia located on sporophytes. |
| 1. | I, III and IV | 2. | II, III and IV |
| 3. | I, IV and V | 4. | II, III and V |
What is not true regarding Cnidarians?
1. Body is mode of distinct tissues but true organs have not evolved
2. They are carnivores
3. They may have two body forms – polyps and medusa
4. The digestion is completely intra-cellular
Difference between Virus and Viroid is
1. Absence of protein coat in viroid but presence of virus
2. Presence of low molecular weight RNA in virus but absence in viroid
3. Both 1 and 2
4. None of the above
Both polyps and medusa in Cnidarians are:
1. Sessile
2. Radially symmetrical
3. Sexually reproducing forms
4. Haploid
Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group?
| 1. | Paramecium and Plasmodium belong to the same kingdom as that of Penicillium |
| 2. | Lichen is a composite organism formed from the symbiotic association of algae and a protozoan |
| 3. | Yeast is used in making bread and brew is a fungus |
| 4. | Nostoc and Anabaena are examples of Protista |
In Cycas:
1. Stems are branched
2. Coralloid roots have symbiotic mycorrhizal association
3. Male cones and megasporophylls are borne on different trees
4. Female gametophyte has an independent free living existence
In the taxonomic hierarchy, the organisms belonging to the same Order must belong to the same:
1. Class
2. Family
3. Genus
4. Species
Identify the incorrectly matched pair:
|
1. |
Numerical taxonomy |
Based on all observable characteristics |
|
2. |
Cytotaxonomy |
Based on chromosome number, structure and behavior |
|
3. |
Chemotaxonomy |
Based on chemotrophic mode of nutrition |
|
4. |
Phylogenetic system |
Based on evolutionary relationships |
In basidiomycetes:
I. Sex organs are absent
II. Basidiospores are formed exogenously on the basidium
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
All the following statements are incorrect regarding Polysiphonia and Porphyra except:
1. Food stored is very similar to amylopectin and glycogen
2. Sexual reproduction is isogamous, anisogamous or oogamous
3. Found mainly in fresh shallow waters
4. 2, unequal flagella inserted laterally
Consider the two statements:
I. Mycoplasma are naturally resistant to antibiotics like penicillin.
II. They are the smallest living cells known and can survive without oxygen.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
Match each item in Column I with one item in Column II and select the correct option from the codes given:
|
COLUMN I |
|
COLUMN II |
|
|
A |
Mosaicism in plants |
P |
Prion |
|
B |
CJD in humans |
Q |
Sporozoan |
|
C |
Smut in wheat |
R |
Virus |
|
D |
Malaria in humans |
S |
Fungus |
Codes
|
|
A |
B |
C |
D |
|
1. |
P |
Q |
R |
S |
|
2. |
R |
P |
S |
Q |
|
3. |
Q |
R |
P |
S |
|
4. |
S |
P |
Q |
R |
In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result:
1. there is no change in the success rate of fertilization
2. there is a high degree of sterility
3. one can conclude that the plant is apomictic
4. self-fertilization is prevented
The causative agent of mad-cow disease is a:
1. bacterium
2. prion
3. worm
4. virus
From an evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in:
| 1. | Gymnosperms | 2. | Liverworts |
| 3. | Mosses | 4. | Pteridophytes |
Match the organisms in Column-I with habitats in Column-II.
| Column-I | Column-II | ||
| (a) | Halophiles | (i) | Hot springs |
| (b) | Thermoacidophiles | (ii) | Aquatic environment |
| (c) | Methanogens | (iii) | Guts of ruminants |
| (d) | Cyanobacteria | (iv) | Salty areas |
Select the correct answer from the options given below:
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iv) | (i) | (iii) | (ii) |
| 2. | (i) | (ii) | (iii) | (iv) |
| 3. | (iii) | (iv) | (i) | (i) |
| 4. | (ii) | (iv) | (iii) | (i) |
Notochord extends from head to tail region and is persistent throughout their life in:
1. Ascidia
2. Salpa
3. Doliolum
4. Branchiostoma
All vertebrates are chordates but all chordates are not vertebrates, why?
| 1. | Notochord is replaced by a vertebral column in the adults of some chordates. |
| 2. | The ventral hollow nerve cord remains throughout life in some chordates. |
| 3. | All chordates possess a vertebral column. |
| 4. | All chordates possess notochords throughout their lives. |
The given floral formula describes the flowers of:
1. Sweet pea
2. Mustard
3. Tobacco
4. Tulip
| 1. | Scales on their hind limbs |
| 2. | Four-chambered heart |
| 3. | Two special chambers crop and gizzard in their digestive tract |
| 4. | Eggs with a calcareous shell |
In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct?
| Genus Name | Two Characters | Phylum | ||
| 1. | Pila | (i) (ii) |
Body segmented Mouth with Radula |
Mollusca |
| 2. | Asterias | (i) (ii) |
Spiny skinned Water Vascular System |
Echinodermata |
| 3. | Sycon | (i) (ii) |
Pore bearing Canal system |
Porifera |
| 4. | Periplaneta | (i) (ii) |
Jointed appendages Chitinous exoskeleton |
Arthropoda |
Identify the corolla aestivation shown in the given picture of a flower:
1. Valvate
2. Twisted
3. Imbricate
4. Vexillary
When the ovules are borne on central axis and septa are absent, the type pf placentation is called as:
1. free central and found in Dianthus and Primrose
2. basal and found in Dianthus and Primrose
3. free central and found in sunflower and marigold
4. basal and found in sunflower and marigold
Which of the following is incorrect regarding the floral characters of Family Solanaceae?
1. Symmetry: actinomorphic
2. Aestivation: valvate
3. Ovary: inferior, unilocular
4. Stamens: epipetalous
Which of the following is not a stem modification?
1. Flattened structures of Opuntia
2. Pitcher of Nepenthes
3. Thorns of citrus
4. Tendrils of cucumber
Diadelphous stamens are found in:
1. Pea
2. China rose and citrus
3. China rose
4. Citrus
Match the following and choose the correct option from below
|
A |
Cuticle |
i. |
Guard cells |
|
B |
Bulliform cells |
ii. |
Single layer |
|
C |
Stomata |
iii. |
Waxy layer |
|
D |
Epidermis |
iv. |
Empty colourless cell |
Options:
|
1. |
A-iii |
B-iv |
C-i |
D-ii |
|
2. |
A-i |
B-ii |
C-iii |
D-iv |
|
3. |
A-iii |
B-ii |
C-iv |
D-i |
|
4. |
A-iii |
B-ii |
C-i |
D-iv |
Read the different components from I to IV in the list given below and tell the correct order of the components with reference to their arrangement from the outer side to the inner side in a woody dicot stem.
| I. | Secondary Cortex |
| II. | Wood |
| III. | Secondary phloem |
| IV. | Phellem |
The correct order is:
| 1. | III, IV, II, I | 2. | I, II, IV, III |
| 3. | IV, I, III, II | 4. | IV, III, I, II |
The type of the neuron shown in the following diagram is seen in:
| 1. | Embryonic stages and Retina |
| 2. | Retina and Olfactory membrane |
| 3. | Retina and Dorsal root ganglion of spinal nerve |
| 4. | Olfactory membrane and Cerebellar peduncles |
Match List-I with List-II.
| List-I | List-I | ||
| (a) | Lenticels | (i) | Phellogen |
| (b) | Cork cambium | (ii) | Suberin deposition |
| (c) | Secondary cortex | (iii) | Exchange of gases |
| (d) | Cork | (iv) | Phelloderm |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (iv) | (ii) | (i) | (iii) |
| 3. | (iv) | (i) | (iii) | (ii) |
| 4. | (iii) | (i) | (iv) | (ii) |
All the following will be responsible for producing secondary tissues in plants except:
1. Intercalary meristem
2. Fascicular vascular cambium
3. Interfascicular cambium
4. Cork cambium
Some vascular bundles are described as open because these:
| 1. | are not surrounded by pericycle |
| 2. | are surrounded by pericycle but no endodermis |
| 3. | are capable of producing secondary xylem and phloem |
| 4. | possess conjunctive tissue between xylem and phloem |
Match the columns and identify the correct option.
| Column I | Column II | ||
| A. | Thylakoids | (i) | Disc-shaped sacs in Golgi apparatus |
| B. | Cristae | (ii) | Condensed structure of DNA |
| C. | Cisternae | (iii) | Flat membranous sacs in stroma |
| D. | Chromatin | (iv) | Infolding in mitochondria |
1. A → (iv), B → (iii), C → (i), D → (ii)
2. A → (iii), B → (iv), C → (i), D → (ii)
3. A → (iii), B → (i), C → (iv), D → (ii)
4. A → (iii), B → (iv), C → (ii), D → (i)
The nucleoli are the site for the synthesis of:
1. mRNA
2. tRNA
3. rRNA
4. Nuclear Proteins
Consider the following statements regarding co-factors required by enzymes:
I. Haem is the prosthetic group in catalase and peroxidase
II. Coenzyme NAD and NADP contain the vitamin niacin
III. Magnesium is a cofactor for carboxypeptidase
The correct statements include
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
1. mitochondria
2. endoplasmic reticulum
3. chloroplasts
4. cytoskeleton
Consider the two statements:
I. If the head of a cockroach is cut off, it will still live for as long as one week.
II. The endocrine hormones can take over the function of neural tissue for short periods.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. Only I is correct
4. Both I and II are incorrect
Consider the two statements:
| Statement- I | Cell is the fundamental structural and functional unit of all living organisms. |
| Statement- II | Cellular organization with metabolism is the defining property of life. |
| 1. | Both I and II are correct and II explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | I is correct but II is incorrect |
| 4. | Both I and II are incorrect |
Glycocalyx:
I. serves to protect the bacterium from harmful phagocytes
II. allow the bacterium to attach itself to inert surfaces
III. prevent desiccation of bacteria
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Match each item in Column I with one in Column II and select the correct answer from the codes given below:
|
|
COLUMN I |
|
COLUMN II |
|
A. |
Tonoplast |
a. |
Vacuole |
|
B. |
Acid hydrolases |
b. |
Lysosome |
|
C. |
rRNA synthesis |
c. |
Nucleolus |
|
D. |
Calcium pectate |
d. |
Middle lamella of plant cell wall |
Codes
A B C D
1. a b c d
2. b a d c
3. a b d c
4. b a c d
The following figure shows:
1. 9 + 2 microtubule arrangement of cilia
2. 9 + 2 microtubule arrangement of centriole
3. 9 + 0 microtubule arrangement of cilia
4. 9 + 0 microtubule arrangement of centriole
The study of karyotype is best done on cells arrested during cell division in:
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
Proteins perform many physiological functions. For example, some functions as enzymes. One of the following represents an additional function that some proteins discharge.
1. Antibiotics
2. Pigment conferring colour to skin
3. Pigment making colours of flowers
4. Hormones
In curve of enzyme catalyzed reaction, the value of velocity of enzyme reaction at point A will be
1. and velocity may increase by increasing temperature
2. and velocity may increase by increasing substrate
3. and velocity may increase by increasing by catalyst
4. and velocity remain constant even changing any factor in to the medium.
Consider the given statements regarding meiotic cell division:
I. A single round of DNA replication is followed by two successive cell divisions where chromosome number is reduced only during the first but DNA content in both
II. DNA replication takes place between meiosis I and meiosis II
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Iodine-KI reagent is added to a solution or directly on a potato or other materials such as bread, crackers, or flour. A resultant blue-black color most directly indicates the presence of:
1. Cellulose
2. Amylopectin
3. Amylose
4. Sucrose
What would be true for the structure of a biomolecule shown below?
1. It shows the primary structure of a polypeptide where A is the C-terminus; B is the peptide bond and C is the N-terminus.
2. It shows the secondary structure of a polypeptide where A is the C-terminus; B is the peptide bond and C is the N-terminus.
3. It shows the primary structure of a polypeptide where A is the N-terminus; B is the peptide bond and C is the C-terminus.
4. It shows the secondary structure of a polypeptide where A is the C-terminus; B is the N-glycosidic bond andzC is the N-terminus.
During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C ?
1. G0 and G1
2. G1 and S
3. Only G2
4. G2 and M
The element that makes up the highest
percent weight of the human body is:
1. Carbon
2. Hydrogen
3. Oxygen
4. Nitrogen
